Micrometer caliper



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1,531,357 H.l E. TAUTZ MICROMETER CALIPER A Filed March '7. 1924 2 Sheets-.Sheet 2 W 716,5/ 'I In are): Z022 Patented Mar. 3l, 192.5. i

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yoke:v 152i ofxaui foperati 01 y-lever; or hand-le 13 whlch extends: out fthrougfh i* a PS101'I 14,5: 1u #che operating;handle-13,isst1essecl hyvv a-,-C0lngi.nventenlfcertaimmew:and ,springlfseateclur anoavry 173m theel-m 3 -touorn'aallyseat` che` foot; 9 on 1 theA anvil 24;niufipvactiaefl,prefer? to; employ. aball 18 seateeLz iur the.v upper L portion of the` f 'cavity between-ille Spring; 16a. auhliaudgle V13.,-

de lmefthat: talle-following is graduatious ori' divisions arermarked-iu@ units from; Zero. toffQQOf aridwover which anrevoluthief pointerl trazvels:- yhe vperfmioter of the pla-teA 15k-'has au ,upburnedliahge.23 to retaini-mgrugl.y The *plate 19 is provided with a central1 opening-,5 eo-axial Wtutlie sleeve-7,1ianda! circularA bushing. 26v proj eats dow-,nal through -.tl1is opening into lthe-vY sleeve.

elemens;E partsf ybevifgligy-101mm www@ bushigis; helcl. against. ,upawircl dispiaceplate 2lprovicle'olwithy circular measerm-gg;;v Scalea on whrehthe:V ludioatiilg\` supporti-.a1 glass,closurey plate -Q spaceclrdooveVV 'Fig-.,- 3 is@ detail, ihm-izonmlggegbinal ygw mentoiumovementhyna split-oollaraZSivvhioh Y on auf enlarged' sainel liae-flookingiz iniitheaopposite; direction,

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prises the usual from-emprunt@ sul s?lowerfienllwhereeilcarrles 'im/grail ieirculrlr 11u13 .34e Whiolmfiis` loosely within, the Sleefvef ,and hasafeeuVt-ral thread- (and: as( eoairespxmdi @poemes mwa;

tightlyroir ztlfieeupper portion ofi the bushing below1 thieeplate l9aby a.. transverseheaded 'Hotell-31u11 :the hlloeln to allow.` ithelhaudlei 1GoY ters a correspondingly shaped opening ink the lower end of a pointer-thimble 37 which lits revolubly within the upper end of the bushing 2G. The thimble 3T has a fiange 38 supported on the head 27 of the bushing 26, and carries the pointer` 22 which is clamped on this fiange by a cap 39 held in Cil Vraised by the handle 13.

place, by a headedbolt Ll() threaded into the thimble. The thimble is free to revolve in the bushing 26 to turn the pointer but is held against upward movement or displace ment by a pin Lil fixed in the bushing and entering an annular groove a2 in the thimble. By this organization the angular end of the screw-shaft 35 freely moves vertically in the pointer-thimble 37 but turns the latter to move the pointer away from zero when the shaft is revolved by longitudinally moving through its nut 34- under the upward pressure of the sleeve .7 when the latter is The pointer is spring stressed to normally stand at zero on the'scale by a long coil-spring 43 located -in the bushing 2G around the screw-shaft 35 andanchored a: its opposite ends to the nut 34 and the thimblc S7 respectively to react between the bushing and screw-shaft; the lower end of the thimble within the bushing is reduced in cross-sectional area to ferm a shoulder all for seating the spring. and the slotted or skeleton construction of the bushing at 33 affords access /to its interior to assemble the spring in place. The pressure or stress of the spring l-f'being directly and positively applied on the pointer-tliimble takes up all wear and lost motion between the upper angular end of the screw-shaft 35 and the thimble and between the lower threaded end of this shaft and its nut 34, and also holds the shaft down on the ball 36.

In using the machine, the parts normally Y stand in the position shown in Figs. l and 2, with the measuring foot on the anvil, the pointer at zero, and the operating handle swung up. Upon rocking the handle down the spring 16 is put under tension, the sleeve 7 and the screw-shaft 35 are moved up, and the latter is rotated in its passage through the nut 34 to rotate the pointer-thimble; whereby the spring 4:3 is wound up, the foot 9 is raised and the pointer 22 moved on the scale away from Zero. If the handle 13 is moved to its limit the shaft 35 and pointer 22 will be given slightly more than a full `revolution and the pointer will be moved over the scale slightly beyond 200, and if the stock to be calipered is now inserted on the anvil under the foot and the handle released the springs 16 and i-3 will return the parts toward their normal positions until the foot reaches the stock on the anvil, when their further movement will be arrested and the pointer will stop at the appropriate indicatstock.

In the use of the machine the collar 28 engages the bushing 2G tight enough to hold the latter from turning by the thrust of the screw-shaft on the nut 34 under normal operations, and to overcome the resistance of the friction washer 32 to turn the bushing in either direction by the handle 3() when it is desired to co-ordinate the foot 9 on the anvil 2 and the pointer 22 at Zero on the scale. This latter capability is of advantage in both the assembling and subsequent use of the device; in vsetting up or caliluatiira` the instrument the bushing may be turned by the collar and its handle to overcome the friction of the washer and revolve the screwshaft and pointer-thimble one way or the other until the adjustment is exact to bring the pointer at zero on the scale when the foot 9 is on the anvil 2. y

The construction and arrangement of parts may be varied without departing from my invention. For example, the relatively stationary member exemplified by the nut 34e for rotating' the screw-shaft may be of any suitable form when the handle lifts the latter, the .main consideration in this respect being' that this member shall rotate the shaft, whereby all gears between the shaft and the operating handle are eliminated. Also, the angle of the helix of the screw is variable so long asv slight vertical pressure on it will revolve it in the sleeve so that friction is reduced.

I claim:

l. In a califpering device, an anviL a reciprocating.measuring-foot in line with the -anvil, a handle to move the foot, a scale and a revoluble pointer, a screweshaft actuating the pointer, means between the shaft and Vfoot to operate the former longitudinally when the latter is moved, and means engaging the screw-shaft to rotate it when it is moved by said operating-means.

2. In a calipering device, an anvil, a reciprocating measuring-foot in the line of the anvil, a handle to move the foot, a scale and a revoluble pointer, a screw-shaft actuating the pointer, a stationary nut engaging the l pointer,

anvil and having a handle,

shaft, and means between the shaft and foot,

screw-shaft having an angular upper end, means between the foot, and shaft to transmit the motion ofthe former to the latter, a

scale and revolublepointer, a thimble actuating the pointer and Vhaving* an angular opening toL slidably engage the angular end of the shaft, anda stationary member engaging the screw-shattwhereby the shaft is rotated whenit is krec'iprocated.

5.. In a calipering device, a frame having an anvil and an elongated Wellin line. with said anvil, a reciprocating screwfshaft in the well, a pointer actuated b y the shaft, a

dial for the po1nter,a reciprocating Ysleeve mounted inthe well and carrying a measuring foot, ak spring yieldingly maintainingV the pointer at zero on the dial, means between theshaft and sleeve to move the shaft when the sleeve is moved, and means to rotate-the shaft when it is moved by the sleeve.

6. In a calipering device, a frame having an anvil and an elongated well in line with said anvil, va screw-shaft in thewell, a thimble kactuated by the shaft and carrying a pointer, a dial for the pointer, a reciprocating sleeve mounted in the well and carryingka measuring i'oot, a stationary member engaging the screw-shaft, a spring between Vfsaid member and Athimble, andV means between the shaft and sleeve to move the shaft when the'sleeve vis moved. y 7^ Y Y 7. In a calipering device, an anvil, a reciprocating sleeve carrying a measuring foot in line with the anvil and having a handle,

a stationary bushing projecting into the sleeve, a reciprocating screw-shaft in the bushing, a coil-spring reactingV between the a reciprocating p reciprocating t sp ri n ly engaging the on the shait to fzero position on the dial, andV a lhandle to bushing and shaft, means between the vsleeve and shaft to transmit the motion of the former to the latter, means engaging the screw-shaft to rotate it whenit is reciprocated, 'a pointer actuated by the shaft, and a scale for said pointer.

8. In a calipering device, an anvil, a reciprocating sleeve carrying a measuring foot in line with the anvil and having a handle, a stationary bushing projecting into the ,sleeve and having a nut at its lower end, a

thimble rotatablymounted inthe upper end of the bushing and carrying a pointer, a reciprocating screw-shaftlin the bushing threaded through said nut and slidably engaging and` turning said thimble, a'coilgV surrounding said shaft in the bushing and connected at its ends tothe nut and thimble, and means between the sleeve and shaft to transmit the motion of the former to the latter. t

9. In a calipering device, a frame having an anvil and achamber in line with said anvil, a `bushing in the chamber, a screwy shaft' inthe bushing and having threaded connection therewith, a pointer actuated byV the shaft, a dial for the pointer, a sleeve 'slidably mounted in the frame and carrying a measuring foot, actuating means between the sleeve and shaft, and means constructed to hold the bushing against turning when the shaft is rotated andtoturn the bushing' on the shaft to adjust the pointer` to its zero position on the dial.

lO.,jIn a calipering device. a trame having an anvil and a chamber in line with said anvil, a bushing in the chamber, a screwshaft in the jbushing and having threaded engagement therewith, a. pointer actuated by the sha't't, a' dial for the pointer, a sleeve slidably mounted `in the trame and carrying a measuring foot, actuating means between the sleeve and shaft, a split-collar in the chamber normally held against turnk ing when the shaft is rotated and rictionalbushing to turn the latter adjust the pointer to its turn the bushing. p

In testimonyvwhereoi I hereto aiix my signature.

n. E. Taura. 

